Improvement in dies for forming eyelets



UNITED STATES I PATENT OFFICE.

ESEK TALLMAN AND NICHOLAS G. HOXSIE, OF PROVIDENCE, RHODE ISLAND, ADMINISTRATOES OF DAVID K. HOXSIE, DECEASED, ASSIGNORS TO 7A- TERBURY BRASS COMPANY AND AMERICAN FLASK AND CAP COMPANY,

OF VATERBURY, CONNECTICUT.

IMPROVEMENT IN DIES FOR FORMING EYELETS.

Specification ibrining part of Letters Patent No. 106,938, dated August 30, lrTlL DAVID K. Hoxsrn, deceased, late of the city and county ot' Providence, in the State of Rhode Island, during his life-time invented certain Improvements in Machinery for the the Manufacture of Metallic Eyelets, ot' which the following is the specification, reference being had to the accompanying drawing, making 'part of the same. The said invention relates to improvements in the manufacture of eyelets, by which the metal is iirst converted into a bellshaped piece or cap, by suitable means, in one machine or class of machinery, and afterward, by other means, or by other and separate classes of machinery, which removes the material or chips from the closed or small end of the bellcap, it is converted into a-n eyelet of the proper form.

The invention herein described relates to the means by which the peculiar bell-cap is made.

The irst part oi' this invention relates to the means by which the metal is cnt from the sheet and converted into the bell-shaped cap; and consists of a compound former and cutting-punch, that co-operates with the cutting orifice or portion of the die in such a manner that the metal is depressed into the entrance of the die in the form of a dish or saucer by the projecting former on the end ofthe punch, and cut from the sheet and deposited in the cutting-orifice in suitable condition to be carried accurately into the forming part of the die by another p.unch,which co-operates therewith, and connects this dish into the bell-cap by carrying it into the forming-die.

The second part of this invention relates to the construction of the drawing portion ot' the said die, or portion between its cutting-orifice where the dish is deposited and that where the bell shape is given to the piece; and consists in forming this part of the die with a swell or annular cushion, upon which the dish is rst deposited, and over which its larin ged ge is drawn as it is carried into the bell-shaped mold beneath, to facilitate the stretching' of the dish-piece equally from the center to its circumference as it is converted into the bell!v cap.

In the accompanying drawing, Figure lis a plan of the essential parts of a machine suited to operate the improved tools or implements which make the bell-caps, and which are shown in cross-section arranged therewith. Fig. 2 represents, by cross-section, the same tools, full working size. Figs. 3 and 4 represent, by cross-section in part, the essential parts of the same, double size, as exhibiting their important features more clearly and appreciably. Fig. 5 represents the two stages of the operation of forming the eyelet by the improved devices described.

Similar letters denote like parts in the several iigures.

As represented in Fig. l, the cutting-punch J is held in a tapering socket in the end of the plunger L of the machine, which plunger slides in the bearing D by means of the lever H, the

connecting-rod I, and the eccentric F on the drivingshaft E.

The forming-punch N is held in a tapering socket in the end of the plunger G, which slides within the plunger L by motion derived from the eccentric K on the same shaft and its connecting-rod A. Such mechanism bein g common and well-known for the purpose, no part of it is herein claimed.

The die M is iirmly fixed in the block B, which forms part of the frame of the machine7 and directly in line with the axis ot the two punches J and N.

On the end of the cutting-punch J there is the usual square cutting-edge t orcuttingont the piece of metal which is to make the eyelet. 7i thin the circumference oit' this cutting-edge t, on the face of the punch, is formed an annular protnberance or former, lmf, which in the operation iirst meet-s the metal and presses it into the cutting-orifice ot' the die until the cutting-edge t of the punch meets the cutting'- edge c of the die, when the portion of metal .beneath the punch is severed from the sheet and converted into a dish shape, s, as seen in the die, Fig. 3, and separately in Fig. 5.

Then this dish is thus cnt out and deposited in the die, it will be seen that the flaring upon the swellor cushion @,with its periphery filling closely the cutting-milice,

g and the curving is of a form to mold and deliver the dish-piece s accurately to the bellcap-forming die f beneath it when carried by a suitably-shaped punch, like N, pressing against its center.

The dish-piece s thus formed and deposited in the entrance of the die is converted into a bell-cap by means' of the forming-punch N and the bell-forming shape f in the bottom of the die, directly beneath the cushion e, which serves to draw and close the dishs center quickly around the end of the punch before it enters the forming-die j', and by that means to center the piece accurately, and to draw the piece considerably before it reaches the point where it receives its bell or eyelet shape.

The forming-punch N is of the shape of the interior of the bell-cap, and the dief is of the shape of the exterior of the saine, and the dishpiece s is converted by the co-operation of the two parts into the bell-shaped cup shown in Figs. 4 and 5, or that of an eyelet with the small end closed,the metal being without any appreciable difference of thickness throughout. This bell-cap is cleared from the end of the punch N as it is withdrawn from the die into the cutting-punch J in the usual way, and afterward the metal at the closed end is rcinoved by grinding it oii, while the cap isheld by suitable means.

Thus it' will be seen that the sheet metal is irst converted into a saucer-like dish by means of the former m and cutting-punch J with the cutting-orifice of the die, and then this dish is converted into a long,` bell-shaped cap by the peculiar formation of the cushion c, the formin g-die j', and forming-punch N.

Claims.

EsnK TALLMAN, NICHOLAS e. HoXsrn,

Adm in imrafors.

fitnesses IsAAc A. BRUMELL, E. F. PHILLIrs. 

